Table 4. Comparison of the precision of lipiodol marking between lower lobes and other lobes.

Variables	RUL + ML+ LUL (N=17)	RLL + LLL (N=13)	P value
Nodule size, mean ± SD (mm)	10.2±4.9	11.3±4.0	0.54
Distance between the nodule and pleura, mean ± SD (mm)	16.6±9.2	19.7±8.8	0.35
Time required for marking, mean ± SD (min)	16.2±5.9	15.2±6.3	0.63
Distance between radio-opaque nodule and SPN, mean ± SD (mm)	9.0±4.6	6.9±2.2	0.11

SPN, small pulmonary nodule; RUL, right upper lobe; ML, middle lobe; RLL, right upper lobe; LUL, left upper lobe; LLL, left lower lobe.